1 #!/usr/local/plan9/bin/rc
2 
3 rfork s	
4 
5 if (! ~ $DEBUG '') flag x +
6 
7 LPDELAY=60
8 
9 if (! ~ $#* 2 && ! ~ $#* 3) {
10 	echo 'usage generic local_cmd _remote_cmd [ success_cmd ]' >[1=2]
11 	exit 'argument count'
12 }
13 LOCAL_CMD=$1
14 REMOTE_CMD=$2
15 SUCCESS_CMD=$3
16 
17 # we don't want to make a LOCK file unless we are at the destination
18 # let the spooler take care of moving it there
19 # this is necessary for clients and servers that share the
20 # same lp queue directory
21 if (! ~ $THIS_HOST $DEST_HOST || ! LOCK $LPSPOOL/$LPDEST/LOCK $THIS_HOST $pid) exit ''
22 
23 cd $LPSPOOL
24 
25 MAXTRY=2
26 PRINTLOG=$LPLOGDIR/$LPDEST^.st
27 
28 fn schedule{
29 	FILE=`{lpsub sched $SCHED $LPDEST}
30 }
31 
32 while (schedule; ! ~ $#FILE 0) {
33 	SCHEDLINE=`{cat $LPDEST/$FILE(1)^id}
34 	LSLINE=`{ls -l $LPDEST/$FILE(1)}
35 	echo `{date} start $SCHEDLINE
36 	if (! test -s $LPDEST/.seqno) {
37 		echo 0 > $LPDEST/.seqno
38 	}
39 	if not {
40 		LPSEQNO = `{cat $LPDEST/.seqno | awk '{seqno = $1 + 1; if (seqno > 999) seqno = 0; print seqno}'}
41 		echo $LPSEQNO > $LPDEST/.seqno
42 	}
43 	STARTIME=`{date}
44 	if (! test -s $LPDEST/$FILE(1)) {
45 		echo `{date} file $LPDEST/$FILE(1) disappeared or is empty
46 		ls -l $LPDEST
47 		echo $SCHEDLINE(2)$SCHEDLINE(4)'	'$SCHEDLINE(3)	$SCHEDLINE(5)' ! '$LSLINE(6) $STARTIME(4) >> $LPLOG
48 		rm -f $LPDEST/$FILE $LPDEST/$FILE^id
49 	}
50 	if not {
51 		if (~ $THIS_HOST $DEST_HOST) {
52 			if (test -f $LPLIB/perm/$LPDEST && grep -s $SCHEDLINE(2) $LPLIB/perm/$LPDEST) {
53 				echo `{date} permission denied
54 				echo you are not allowed to use printer $LPDEST | mail $SCHEDLINE(2)
55 				rm -f $LPDEST/$FILE(1) $LPDEST/$FILE(1)^id
56 			}
57 			if not {
58 				echo `{date} sending to printer
59 				> $PRINTLOG
60 				STARTIME=`{date}
61 				@{eval $LOCAL_CMD}
62 				rv=$status
63 				ENDTIME=`{date}
64 				status=$rv
65 				if () {
66 					echo $SCHEDLINE(1)^$SCHEDLINE(3)'	'$SCHEDLINE(2)'	'$SCHEDLINE(4)' + '$LSLINE(6)' '$STARTIME(4)' '$ENDTIME(4)
67 					eval $SUCCESS_CMD
68 					rm -f $LPDEST/$FILE(1) $LPDEST/$FILE(1)^id
69 				}
70 				if not {
71 					echo $SCHEDLINE(1)^$SCHEDLINE(3)'	'$SCHEDLINE(2)'	'$SCHEDLINE(4)' - '$LSLINE(6)' '$STARTIME(4)' '$ENDTIME(4)' status='$rv
72 					THISTRY=`{echo $SCHEDLINE(4) + 1|hoc}
73 					echo $SCHEDLINE(1) $SCHEDLINE(2) $SCHEDLINE(3) $THISTRY >$LPDEST/$FILE(1)^id
74 					if (test $THISTRY -ge $MAXTRY) {
75 						if (test -d $LPLIB/prob/$LPDEST) {
76 							cp $LPDEST/$FILE(1) $LPLIB/prob/$LPDEST
77 							cp $LPDEST/$FILE(1)^id $LPLIB/prob/$LPDEST
78 							cp $PRINTLOG $LPLIB/prob/$LPDEST/$FILE(1)^log
79 						}
80 						upasname=daemon
81 						mail $SCHEDLINE(2) <<endmail1
82 						rm -f $LPDEST/$FILE(1) $LPDEST/$FILE(1)^id
83 					}
84 					if not {
85 						touch $LPDEST/$FILE(1)
86 						sleep $LPDELAY
87 					}
88 				}
89 			}
90 		}
91 		if not {
92 # we don't want to be here
93 #			trap '' 13	# temp hack: ignore SIGPIPE
94 			echo `{date} queuing - should not get here
95 			STARTIME=`{date}
96 			eval $REMOTE_CMD 
97 			rv=$status
98 			ENDTIME=`{date}
99 			if (~ $rv '') {
100 				echo $SCHEDLINE(1)^$SCHEDLINE(3)'	'$SCHEDLINE(2)'	'$SCHEDLINE(4)' + '$LSLINE(6)' '$STARTIME(4)' '$ENDTIME(4)
101 				rm -f $LPDEST/$FILE(1) $LPDEST/$FILE(1)^id
102 			}
103 			if not {
104 				echo $SCHEDLINE(1)^$SCHEDLINE(3)'	'$SCHEDLINE(2)'	'$SCHEDLINE(4)' - '$LSLINE(6)' '$STARTIME(4)' '$ENDTIME(4)
105 				echo status $rv from '$REMOTE_CMD'
106 				THISTRY=`{echo $SCHEDLINE(4) + 1|hoc}
107 				echo $SCHEDLINE(1) $SCHEDLINE(2) $SCHEDLINE(3) $THISTRY >$LPDEST/$FILE(1)^id
108 				if (~ $THISTRY $MAXTRY) {
109 					upasname=daemon
110 					mail $SCHEDLINE(2) <<endmail2
111 				}
112 				if not {
113 					touch $LPDEST/$FILE(1)
114 					sleep $LPDELAY
115 
116 				# this is here to deal with running out of
117 				# Datakit channels or other stupid problems
118 				# backoff connection attempts but not too long
119 					LPDELAY=`{echo $LPDELAY '*' 2|hoc}
120 					if (test $LPDELAY -gt 960)
121 						LPDELAY=60
122 				}
123 			}
124 		}
125 	}
126 }
127 Your job has failed to print on $LPDEST after $MAXTRY attempt(s).
128 If the directory $LPLIB/prob/$LPDEST exists on $DEST_HOST,
129 the file has been put there along with the printer log file.
130 			Your friendly printer daemon
131 endmail1
132 Your job has failed to print on $LPDEST after $MAXTRY attempt(s).
133 There is a problem in sending the job to $DEST_HOST,
134 but I'll keep trying.  Have a nice day.
135 			Your enthusiastic printer daemon
136 endmail2
137 UNLOCK $LPSPOOL/$LPDEST
138 rm $LPSPOOL/$LPDEST >[2]/dev/null